Amazon Just Walk Out
Aug 2022 – Present
Software Development Engineer II
- Release lead, streaming receipt latency. Designed a streaming store orchestrator on Redis streams and Java RxFlowable that replaced 30 second batches with three parallel request/response pipelines, cutting receipt latency by 50% while coordinating milestones for four engineers.
- Release lead, Transformer-based algorithm. Guided four SDEs and two researchers through a four milestone plan that brought 6,000 lines of research code for a beverage encoder/decoder model into production mainline, deployed to 200 stores after accuracy evaluations on more than 10 fixture types.
- Release lead, neural network backend. Replaced a random forest classifier with a neural network across 171 stores for a 68% latency improvement and 25% fewer false positives, then used memray to cut peak on-premises memory by 15%.
- Retired the legacy system for a saving of $4,000 per month and a week of developer effort each month, and called research code in-line from Java through JEP.
- Shipped a sidecar service that automated account discovery and permissions, adopted by seven teams for allow-listing during 171 store launches, and removed overly aggressive DynamoDB locking to reduce store operation costs by 10%.
